Person besides the two primarily involved

Wikipedia Word definitions in Wikipedia
Third Party is an album by American instrumental hip hop duo Blue Sky Black Death . It was released on Fake Four Inc. in 2010. The album is a collaboration with Alexander Chen of Boy in Static .

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM OTHER ENTRIES ▪ Both companies will meet with a neutral third party to resolve the disagreement. EXAMPLES FROM CORPUS ▪ Is it lawful to refer questions of fact and law to a third party to determine in a non-judicial fashion? ▪ It also ...

WordNet Word definitions in WordNet
n. someone other than the principals who are involved in a transaction a political party organized in opposition to the major parties in a two-party system

Wiktionary Word definitions in Wiktionary
n. 1 someone not directly involved in a transaction. A third entity in the Seller (first party) and Customer (second party) relationship. A Seller may employ a third party to perform specific services to augment the value of a product. For example, a manufacturer ...